Liquid level on-line measurement method based on magnetic buoyancy

A measurement method and liquid level technology, which is applied in the direction of buoy liquid level indicator, etc., can solve the problems of unstable concentration level, high humidity, high speed and accuracy of liquid level measurement, etc.

Active Publication Date: 2009-04-08
苏州浙远自动化工程技术有限公司
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AI Technical Summary

Problems solved by technology

In the process of concentrating traditional Chinese medicine, the liquid medicine is in a low-pressure and airtight state, and the temperature is kept between 60 and 100 °C. The water vapor in the tank is large and the humidity is high. Generally, the sensing element is easy to corrode and age, and it is easy to cause inaccurate measurement after a period of use. or failure to display
In addition, Chinese herbal medicine extracts often contain saponins and mucous components. When concentrated under reduced pressure, a large amount of foam will be produced. In addition, the medicinal liquid flowing from the heating chamber into the evaporation chamber will hit the liquid surface and cause droplets to splash around, causing the evaporation chamber to appear. Multiple unstable concentration levels make it difficult to judge the liquid level, and the concentration section has relatively high requirements for

Method used

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  • Liquid level on-line measurement method based on magnetic buoyancy
  • Liquid level on-line measurement method based on magnetic buoyancy

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) Application of multi-effect evaporator, see figure 1 , the multi-effect evaporator is composed of evaporation chamber 1, boiling chamber 2, magnetic float level gauge 3 and connecting pipe 4, evaporation chamber 1 and boiling chamber 2 are connected through connecting pipe 4, and magnetic floating ball level gauge 3 is mainly composed of magnetic floating ball 5 , sensor 6 and transmitter 7, the magnetic floating ball 5 and sensor 6 are installed in the boiling chamber 2, when the magnetic floating ball 5 floats up and down with the change of liquid level, the magnetic steel in the floating ball is attracted to the corresponding position in the sensor 6 The dry reed switch changes the total resistance (or voltage) of the sensor, and then the transmitter converts the changed resistance (or voltage) signal into a 4-20mA current signal output;

[0016] The magnetic float level gauge can use the CTT001 magnetic buoyancy level gauge manufactured by Shanghai Xiongfeng Aut...

Embodiment 2

[0021] (1) System calibration

[0022] A CTT001 magnetic buoyancy liquid level gauge is installed in the multi-effect evaporator used in the pilot test implemented by the present invention, and the one-to-one correspondence between the liquid level of the evaporator and the position of the magnetic floating ball is calibrated with clear water and ethanol solution respectively. System calibration can be done by addition or subtraction. Addition is to add liquid quantitatively to the lower limit of the liquid level gauge, calibrate the minimum volume, then add liquid quantitatively in batches, and record the amount of liquid added and the position of the magnetic floating ball one by one. Repeat the operation until the upper limit of the liquid level gauge scale. The scheme of subtraction calibration is: first quantitatively add liquid to the upper limit of the liquid level gauge, calibrate the maximum volume scale, and then release the liquid quantitatively from the bottom val...

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PUM

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Abstract

The invention provides a liquid level online measuring method based on the magnetic buoyancy. Through calibrating the corresponding volume of the liquid level in a multiple effect evaporator, the function relationship between the volume and the liquid level is constructed, and the function is inputted into a computer, thereby measuring the evaporation liquid volume; and the density function Rho and the temperature correction coefficient k of the condensed liquid evaporation process are measured, and the relevant parameters are inputted in to the computer, thereby measuring the mass of the evaporation liquid. The invention provides a liquid level measuring method based on the principle of magnetic floater, the aim is to solve the technical problem of condensed liquid measurement in the vacuum boiling state, to achieve the real automatic control of the condensed process, to reduce the condensed process differences of traditional Chinese medicine between different batches, and to provide a new technology for improving the production quality stability and the modernization of the traditional Chinese medicine. The invention has the advantages of reasonable design, simple preparation of the multiple effect evaporator, and low cost.

Description

technical field [0001] The invention belongs to the technical field of process analysis and detection, and relates to an on-line liquid level measurement method in the multi-effect evaporation concentration process based on magnetic buoyancy, which overcomes the instability of the state caused by violent liquid turbulence, foam ups and downs, and system pressure changes during the concentration process, and is especially suitable for The invention discloses an on-line liquid level measurement method for concentrated traditional Chinese medicine extract materials by multi-effect evaporation in a vacuum state. Background technique [0002] The concentration section is an important link in the production of traditional Chinese medicine. It distills and concentrates the extract to make the concentration of the medicinal liquid meet the production requirements. , stability and so on are closely related, and it is a crucial operation unit in the process of traditional Chinese medi...

Claims

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Application Information

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IPC IPC(8): G01F23/30
Inventor 陈勇王龙虎刘雪松
Owner 苏州浙远自动化工程技术有限公司
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